adb.exe is a program which is probably NOT a virus. So, if adb.exe is on your system, it is probably ok, and will NOT be a cause for concern. Even if your PC is virus-free, we still advise you to purchase a well-known antivirus with a good detection rate, in order to yourself yourself against threats.
This program is normally found in C:\Program Files (x86)\HTC\HTC Sync Manager\HTC Sync\adb.exe.
The MD5 fingerprint for this file is 5aa2ef905ae19437f57311a1e7afa41f.
This application is NOT a Windows service. This is very good.
This application runs in 32-bit mode. It does not use the entire power of nowadays' computer chips. This is quite normal because the makers did not upgrade it to 64-bit code.
adb.exe is digitally signed. Today most legit programs are digitally signed.
The digital signature attached to adb.exe checks out perfectly. This is excellent.
Digitally signed by: Nero AG
Certificate's issuer name: Symantec Class 3 SHA256 Code Signing CA
This executable does NOT have an uninstall command stored in registry.